32 research outputs found

    Counseling Skills in Intercultural Education: The Case of foreign seas immigrants in Greece

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    This paper presents some points of view about the counseling psychology skills that are required in intercultural education context. This issue arises from the rather massive migration that has been observed in the European Union countries, since 2007, involving three million persons until 2015. Especially Greece has received directly the largest number of refugees, among the European countries, due to its proximity to Middle East as the Southeastern “Gate” of European Union, amounting to 1.8 million individuals. In addition, 60,000 illegal immigrants and refugees have been trapped in Greece for the last two years. This phenomenon causes extra considerations on behalf of the European and, in particular, Greek counseling agencies and experts. The intercultural education infrastructures of Greece are very limited compared to the existing needs. Less than 0.2% of schools are intercultural ones, while approximately 10% of the country’s pupils are foreigners. In this context, many teachers often discriminate against pupils from other countries and very few schools, besides intercultural ones, dare to organize counseling and support meetings for immigrant parents, usually with the help of volunteer teachers. However, there is also a significant number of teachers who are calling for better and more in-depth information on both general and intercultural counseling, as well as a clear reference to the relevant skills required for this purpose. In intercultural counseling, the counselor and the consulted come from different cultural contexts and have different perceptions. However, counseling can help them to deal with social exclusion. The needs of minority populations and vulnerable social groups, in general, are particularly high in terms of professional development, as they need the appropriate knowledge to lead their members in the search for educational opportunities, opportunities for social participation, vocational rehabilitation, but also clarification of professional goals. The effectiveness of a counselor on intercultural counseling is based on cultural awareness and sensitivity to accept and respect the cultural differences. A counselor must find a way to overcome any inhibitory obstacle, such as language, but the most important thing that needs to be understood is that counseling cannot be practiced in a mono-cultural direction, as it was the case until recently, but has to turn to methods of multicultural thinking and action

    Materials-induced variation in the torque expression of preadjusted appliances

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    The purpose of this article is to comprehensively investigate the sources of variation in the expression of torque in preadjusted appliances. Variables related to properties of materials were systematically analyzed, including (1) the inability to fill the slot because of the size difference of archwires and bracket slot, (2) irregularities from the manufacturing process of brackets precluding proper engagement, (3) differences in the stiffness of wire alloys engaged to the bracket slot, (4) variations between actual and reported bracket torque values, and (5) ligation modes, all of which might account for increased third-order clearance or bracket-archwire "play." The effect of these variations on the expression of torque is discussed, and the net buccolingual inclinations are provided as a function of wire size and composition for common bracket slot-archwire combinations. Most reports published on this issue indicate a loss of torque control as high as 100% of the prescribed value. Furthermore, the fallacy of transferring the ideal crown inclination to the torque prescribed in the bracket is illustrated, along with the underestimation of the prescribed torque relative to the proper tooth crown. The realistically required torque is analyzed to its constituent components, involving tooth inclination, compensation for the slot-wire play, and incomplete ligation with elastomeric ligatures. Based on the evidence available, it is proposed that a high-torque prescription should be selected to account for the lack of full expression of the prescribed torque that occurs clinically

    Enamel surface roughness following debonding using two resin grinding methods

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    The purpose of this study was to assess quantitatively the roughness of the enamel surface following debonding using two resin removal methods. The enamel surface of 30 premolar crowns was covered with black tape with a 3 mm window on the middle buccal third to standardize the area of analysis. The initial enamel surfaces were subjected to profilometry, registering four roughness parameters (Ra, Rq, Rt and Rz). The brackets were bonded to the plaster-embedded enamel surfaces with a chemically cured, no-mix adhesive, and debonded after 1 week. Resin removal in half of the specimens was performed with an eight-bladed carbide bur, and in the other half with an ultra-fine diamond bur, both attached to a high speed hand piece; a second profilometric measurement was made after resin removal. Finishing of all surfaces was achieved with Soflex discs and a third registration of roughness followed. The duration of each resin removal protocol was also recorded. The results were analysed with two-way ANOVA and the Newman-Keuls test with the two resin grinding modes and the three intervals serving as discriminating variables (n = 15). For the duration results, a one-way ANOVA was used. Significant differences (P < 0.05) were observed with respect to enamel roughness parameters between the two resin grinding methods used, while there was no consistent roughness-reducing effect of finishing with Soflex discs. Resin removal with a diamond bur was achieved in approximately half the time compared with the eight-bladed bur. The increase in most roughness variables induced by the debonding procedures was not reversed at the end of the finishing stage, regardless of the resin removal protocol used, suggesting an irreversible effect on enamel texture. © European Orthodontic Society 2004; all rights reserved

    Light-cured or chemically cured orthodontic adhesive resins? A selection based on the degree of cure, monomer leaching, and cytotoxicity

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    Purpose: The purpose of this study was to estimate the degree of cure and monomer leaching of a light-cured and a chemically cured (no-mix) adhesive and to assess their biologic properties. Material: The degree of cure of adhesive specimens prepared with a procedure identical to the clinical bonding process was assessed by infrared spectroscopy. The adhesives were then immersed in normal saline solution for 2 months, and the residual monomer leached from the adhesives was quantitatively and qualitatively analyzed by liquid chromatography. The effect of the immersion media on human gingival fibroblasts' viability and proliferation was also evaluated with the 3-(4,5-dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide (MTT) and deoxyribonucleic acid (DNA) synthesis assays, respectively. The results were analyzed by analysis of variance and Tukey test (α =. 05). Results: No difference was found between the 2 adhesives with respect to their degree of cure and the amount of triethylene glycol dimethacrylate released; no diglycidyl dimethacrylate monomer was detected in the eluent. However, significant qualitative changes in the composition of the substances eluted from the 2 adhesives were observed. Conclusions: Whereas no cytotoxic effect was shown for either immersion media, a moderate reduction in the DNA synthesis was obtained by both adhesives, implying a minor cytostatic effect. Further research is required to assess the long-term biologic properties of adhesives, including potential estrogenic action. Copyright © 2005 by the American Association of Orthodontists

    Titanium orthodontic brackets: Structure, composition, hardness and ionic release

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    The structural composition, hardness and ionic release of Orthos2 and Rematitan brands were investigated. Five specimens of each group were examined and the resin-embedded and metallography polished specimens were analyzed. It was found that Orthos2 brackets consisted of two parts, the base, comprising of commercially pure Ti grade II, and wing comprising of Ti-6Al-4V alloy, joined together by laser welding, producing large gaps along the base wing interface. It was also found that the structural and hardness differences influenced the torque characteristics from activated archwires to the brackets and the crevice corrosion potential at the base-wing interface
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